Java 中的堆栈容量()方法，示例
原文:https://www . geesforgeks . org/stack-capacity-method-in-Java-with-example/
栈类的容量()方法用于获取该栈的容量。这是此堆栈容器中存在的元素数量。
语法:
public int capacity()
参数:该函数接受一个参数 E obj ，该参数是要添加到堆栈末尾的对象。
返回值:该方法返回整数值，即堆栈的容量
下面的程序说明了 Java.util.Stack.capacity()方法:
例 1:
// Java code to illustrate boolean capacity()
import java.util.*;
import java.util.ArrayList;
public class GFG {
public static void main(String args[])
{
// Creating an empty Stack
Stack<String> stack = new Stack<String>();
// Use add() method to add elements in the Stack
stack.add("Geeks");
stack.add("for");
stack.add("Geeks");
stack.add("10");
stack.add("20");
// Displaying the Stack
System.out.println("The Stack is: " + stack);
// checking capacity
System.out.println("Capacity: "
+ stack.capacity());
}
}
Output:
The Stack is: [Geeks, for, Geeks, 10, 20]
Capacity: 10
例 2:
// Java code to illustrate
// boolean add(Object element)
import java.util.*;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<Integer> stack
= new Stack<Integer>();
// Use add() method
// to add elements in the Stack
stack.add(10);
stack.add(20);
stack.add(30);
stack.add(40);
stack.add(50);
// Displaying the Stack
System.out.println("The Stack is: " + stack);
// checking capacity
System.out.println("Capacity: "
+ stack.capacity());
}
}
Output:
The Stack is: [10, 20, 30, 40, 50]
Capacity: 10
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